Apparatus for promoting combustion



O. BERND, J1". v APPARATUSTOR PROMOTING COMBUSTION. No, 575,049.

{No Model.)

Patented Jan. 12, 1897.

NITED STATES- ATENT Fries,

CHARLES BERND, JR., OF RIVERSIDE, NEIV JERSEY.

APPARATUS FOR PROMOTING COMBUSTION.

SPECIFICATION forming part of Letters Patent No. 575,049, dated January12, 1897. Application filed Octobe 16, 1896. Serial No. 609,043 (Nomodel.)

To all whom, it may concern.-

Be it known that 1, CHARLES BERND, J r., a citizen of the United States,residing at Riverside, in the county of Burlington, State of New Jersey,have invented a new and useful Improvement in Apparatus for Promotin gCombustion in Furnaces, to. which improvement is fully set forth in thefollowing specification and accompanying drawing.

My invention consists of a novel construc tion of apparatus forpromoting combustion in furnaces, the same consisting of a casingadapted to be located adjacent a furnace and having supported therein aplurality of fans, one of said fans being operated by the impact ofsteam directed thereupon, while the other fan is adapted to propel airinto the casing, the air and steam meeting in a comminglingchamber belowsaid fans and the commingled steam and air being finally discharged'intothe furnace. I

It further consists of novel details of construction, all as will behereinafter set forth, and specifically pointed out in the claims.

The figure represents a side elevation, partly in section, of anapparatus for promoting combustion in furnaces embodying my invention.

Referring to the drawing,-A designates a furnace of usual construction,the grate B thereof being adapted to support the fuel C, which may berice coal, screenings, culmslack, or other combustible material.

D designates the ash-pit of the furnace, into which the casing E isadapted to discharge, the upper portion F of said casing having attachedthereto the cross-bars G and H, which serve as bearings for the shaft Jupon which are mounted the fans K and M, each fan being provided withthe Wings or blades L and N, respectively.

P designates steam-inlet pipes, which are connected with a suitablesteam-supply,which may be the boiler heated by the furnace to which theinvention is applicable, said steampipes having the discharge-outlets Q,entering the portion F of the casing and adapted to direct the incomingsteam against the blades of the fan M, it being noted that said latterfan is in the present instance somewhat less in diameter than the fan Kand that the upper part of the casingis of greater width than theportion thereof below the fan M.

It will be noticed that the lower end of theportion F of the casing iscontracted where it circumscribes the fan M, forming a nozzle whichserves to cause the incoming air to be forcibly impacted against saidfan and to be primarily commingled with the steam which operates saidfan. Then the an; and steam, after being stirred around by, said fan,are completely commingled in the chamber R, the commingled air and steamthen being forcibly ejected in large volumes from said chamber into thefurnace. It will also be seen that the shaft J is supported in saidupper portion F of the casing, so that the commingling-chamber R andlower portion of the casin g are unobstructed and steam is preventedfrom condensing on said shaft, as the latter is above the fan M, againstwhich the steam is impacted and from which it is forced downwardly bythe incoming air in large quantities, due'to the action of the fan K.

The operation is as follows: The incoming steam entering through thepipes P discharges upon the blades of the steam-fan M, thereby causingthe same to rapidly revolve, the airfan K also revolving in unisontherewith, while the exterior air is drawn in the upper portion F of thecasing through the medium of the fan L, as indicated by the arrows, anddischarged upon and by the steam-actuated fan M into thecommingling-chamber R. The steam and air are thoroughly commingled inthe chamber R and pass thence through the outlet S to the ash -pit D ofthe furnace, thereby producing a positive and effective draft, and thethoroughly-commingled steam and air serving to promote combustion to ahigh degree.

It will be seen that I preferably construct the fan M separate from theshaft J for convenience in assembling, said shaft being first placed inposition upon the cross-bar H, after which the crossbar G is secured inplace'and the hub of the fan M fastened upon that portion of the shaft Jwhich projects below said cross-bar H, especial attention being directedto the fact that the impact of the incoming steam upon one of the fanscauses the exterior air to be drawn in and thoroughly commingled withthe steam in the commingling-chamber below the fans.

It will of course be evident that the angle at which the outlets Q ofthe steam-pipes l" discharge upon the fan M may be slightly inclined orvaried according to requirements, or the portions Q of the pipe maybecurved, if desired. It will further be apparent that various changes maybe made by those skilled in the art which will come within the scope ofmy invention, and I do not therefore desire to be limited in everyinstance to the exact construction I have herein shown and described.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A blower consisting of a casing, a plurality of fans mounted in theupper portion thereof, and a steam-supply pipe leading to the lower fan,said casing being contracted around said fan, forming a nozzle whichleads to the commingling-ehamber below the same, the discharge portionof the casing being below said chamber.

2. A blower consisting of a casing open at top and adapted tocommunicate with a furnace and an air-suction and a steam-operated fanin the upper portion of said casing, said fans havin g their shaftmounted in hearings in said portion, leaving the comminglingchamberbelow said fans unobstructed, the discharge portion of the blower beingbelow said chamber.

A blower consisting of a suitable casing open at its top, a plurality ofcross-bars attached to said casing, a shaft having its bear ings in saideross-bars and having an air-fan mounted thereon, said shaft having ajournal projecting through the lower cross-bar and a steam-actuated fanmounted on said journal, in combination with a steam-pipe adapted todischarge upon said last-mentioned fan, a commingling-chamber below saidfans, and means for conducting the commingled steam and air thence to afurnace.

CHARLES BERNI), JR.

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